Blood travels around the body in tubes called arteries, veins or capillaries Arteries carry blood away from the heart towards an organ Veins carry blood from an organ towards the heart.

For example, a capillary is microscopically thin to allow gases to exchange, the arteries are tough and flexible to cope with high pressure blood flow and the veins contain valves to prevent the ...

The section of vein or man-made blood vessel graft is sewn onto both the femoral and popliteal arteries so that blood can travel through the new graft vessel and around the narrowed or blocked area.

In order to get blood to the heart muscle of a by-pass patient more efficiently, surgeons first need to borrow veins or arteries from non-critical areas of the body and then stitch them into the ...